Assertion : Plants utilizing first RuBP in `CO_(2)` fixations are clled `C_(3)` plants.
Reason : plants utilizing first PET in `CO_(2)` fixations are called `C_(4)` plants.

Options

A. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
B. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
C. If the assertion is true but the reason is false
D. If both the assertion and reason are false

Answer

A

Explanation

In `C_3` cycle the primary acceptor of `CO_2` is a 5 – carbon ribulose 1, 5 bisphosphates to form first stable product is a 3 – carbon compound phosphoglyceric acid.
In `C_4` cycle, the primary acceptor of `CO_2` is a 3- carbon compound phosphoenol pyruvic acid to form first stable product is 4 carbon compound oxaloacetic acid.